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Displaying 751 - 775 of 3757

Quantum Logic with a Few Trapped Ions

January 1, 1998
Author(s)
C Monroe, Wayne M. Itano, D Kielpinski, B E. King, Dietrich Leibfried, C J. Myatt, Q A. Turchette, David J. Wineland, Chris S. Wood
… Small laser-cooled crystals of atomic ions have attracted considerable interest in the last several … paper considers quantum logic schemes for small numbers of ions in the context of recent experiments at NIST. … Quantum Logic with a Few Trapped Ions …

Lifetime of the metastable 2 P 1/2 state of F-like Ar 9+ isolated in a compact Penning trap

September 6, 2018
Author(s)
Samuel M. Brewer, Joan M. Dreiling, Nicholas D. Guise, Shannon M. Hoogerheide, Aung Naing, Joseph N. Tan
… Highly-ionized atoms are extracted from an electron beam ion trap (EBIT) and guided into the ion capture apparatus. Upon capturing the Ar 9+ ions, light … ion trapping, lifetimes, oscillator strengths, positive-ion beams, transition moments …

Quasi-elastic Neutron Scattering Measurement of Hydrogen Diffusion in a Graphene Oxide Framework

April 16, 2020
Author(s)
Matthew J. Connolly, Z. N. Buck, Carlos Wexler, Joseph C. Schaeperkoetter, H. Taub, Andrew Gillespie, Helmut Kaiser
… neutron scattering (QENS) spectra from molecular hydrogen adsorbed in GOF. The measurements probed the motion of adsorbed hydrogen as a function of pressure, in order to understand … Quasi-elastic Neutron Scattering Measurement of Hydrogen Diffusion in a Graphene Oxide Framework …

Impact of Ni-like metastable states and hyperfine quenching on charge state distribution in an EBIT

June 30, 2025
Author(s)
Chowdhury Abrar Faiyaz, Endre Takacs, Timothy Burke, FNU Dipti, Galen O'Neil, Adam Hosier, Hunter Staiger, Joseph Tan, Yuri Ralchenko
… and spectral features of ions in electron beam ion trap (EBIT) devices. Ladder ionization with intermediate … Nd ions, we show that these processes significantly alter ion populations and spectra, emphasizing the importance of … Plasma diagnostics - charged-particle spectroscopy, Ion sources (positive ions, negative ions, electron cyclotron …

Ion transport across solid-state ion channels perturbed by directed strain

April 28, 2020
Author(s)
Alexander Smolyanitsky, Alta Y. Fang, Andrei Kazakov, Eugene Paulechka
… and molecular dynamics simulations to consider aqueous ion flow across non-axisymmetric nanopores in monolayer … relationship in solid-state and biological ion channels. Specifically, the observed anisotropic effects … Ion transport across solid-state ion channels perturbed by …

Ion transport and reordering in a two-dimensional trap array

May 19, 2020
Author(s)
Yong Wan, Robert Jordens, Stephen Erickson, Jenny Wu, Ryan S. Bowler, Ting R. Tan, Panyu Hou, Andrew C. Wilson, Dietrich Leibfried
… (2D) segmented linear Paul trap to reconfigure a two-ion crystal. The secular motion of the ions experiences low … in a large-scale, two- or three-dimensional trapped-ion quantum information processor. … Ion transport and reordering in a two-dimensional trap array …

Enhancing molecular flux through nanopores via attractive interactions

November 1, 2006
Author(s)
John J. Kasianowicz, Tam Nguyen, Vincent M. Stanford
… has a low dielectric constant (' ~ 2), it was shown that ion-selective transporters, now known as protein ion channels, are water-filled pores (5). The ability to … the means to probe the structure-function relationship of ion channels. Channels, and channel-like entities also …

Detecting ion pairing in sodium halide solutions with dielectric spectroscopy

July 1, 2025
Author(s)
Michael Woodcox, Sarah Evans, Rebecca Bone, Spencer Mattes, Avik Mahata, Aaron Hagerstrom, Chris Muzny, Ravishankar Sundararaman, Kathleen Schwarz, Angela Stelson
… in the dielectric spectra, the contributions of the ion-ion and ion-water interactions can be difficult to measure and … Detecting ion pairing in sodium halide solutions with dielectric …

Using Laser-Cooled Atoms as a Focused Ion Beam Source

December 1, 2006
Author(s)
James L. Hanssen, E Dakin, Jabez J. McClelland, M Jacka
… describe a new method for creating a high quality focused ion beam using laser-cooled neutral atoms in a magneto-optical trap as an ion source. They show that this new technique can provide … that are better than the state of the art in focused ion beams. The source can be used with a range of different …

Fully Quantum Cross Second Virial Coefficients for the Three-Dimensional He-H2 Pair

September 21, 2014
Author(s)
Giovanni Garberoglio, Konrad Patkowski, Allan H. Harvey
… virial coefficient B12(T) between helium and molecular hydrogen. The path-integral method used in this work fully accounts for both the flexibility of the hydrogen molecule and for quantum effects. The effect of … helium, hydrogen, quantum effects, thermodynamics, virial coefficients …

Coupled quantized mechanical oscillators

March 10, 2011
Author(s)
Kenton R. Brown, Christian Ospelkaus, Yves Colombe, Andrew C. Wilson, Dietrich G. Leibfried, David J. Wineland
… between two motional modes of an individual trapped ion has been achieved by coupling through optical fields [6], … into hybrid quantum systems, such as coupling a trapped ion to a quantized macroscopic mechanical or electrical … interaction, coupled oscillators, harmonic oscillator, ion trap, mechanical oscillator, quantum oscillator, trapped …

Voids and Clusters in Expanded Water

January 1, 1999
Author(s)
Raymond D. Mountain
… used to examine the size distributions of suitably defined hydrogen bonded clusters, physical clusters, and voids. The cluster structure of both hydrogen bonded clusters and physical clusters changes … cluster, hydrogen bond cluster, molecular dynamics, size distribution, …

Non-solvating, side-chain polymer electrolytes as lithium single-ion conductors: synthesis and ion transport characterization

October 3, 2019
Author(s)
Jiacheng Liu, Phillip D. Pickett, Bumjun Park, Sunil Upadhyay, Sara Orski, Jennifer Schaefer
… Solid-state single-ion conducting polyelectrolytes have drawn considerable … interest for secondary lithium batteries due to their high ion conductivities under solvent-free conditions. … materials; however, their potential is limited due to the ion transport mechanism being coupled to segmental …

Automated Analysis of Organic Particles Using Cluster SIMS

June 1, 2004
Author(s)
John G. Gillen, Cynthia J. Zeissler, Christine M. Mahoney, Abigail P. Lindstrom, Robert A. Fletcher, P Chi, Jennifer R. Verkouteren, David S. Bright, R Lareau, M Boldman
… Cluster primary ion bombardment combined with secondary ion imaging is used in an ion microscope secondary ion mass spectrometer for the … SIMS, explosives, inkjet, particle searching, polyatomic ion …

Application of Microcalorimeter Energy Measurement to Biopolymer Mass Spectrometry

March 1, 2001
Author(s)
B. Neuhauser, Gene C. Hilton, John M. Martinis
… microcalorimeter detector. We emphasize the measurement of ion-impact energy as a way to obtain extra information that … measurements are used to discriminate against erroneous ion-strikes, to resolve ambiguities that connot be resolved … ion energy, microcalorimeter, mixture analysis …

Quantitative Depth Profiling of an Alternating Pt/Co Multilayer and a Pt Co Alloy multilayer by SIMS using a Buckminsterfullerene (C60) Source

May 15, 2007
Author(s)
K.J. Kim, David S. Simons, J Greg Gillen
… Buckmins erfullerene ion beam has been applied o he dep h profiling of an al erna … Quan i a ive dep h profiling was performed by secondary ion mass spec rome ry (SIMS) wi h C60 ions using P Co alloy … were used o conver an original dep h profile o a composi ion dep h profile. A severe in erface ar ifac observed in he …

Measurement of Ion-Pairing Interactions in Buffer Solutions with Microwave Microfluidics

January 1, 2019
Author(s)
Charles A. Little, Angela C. Stelson, Nathan D. Orloff, Christian J. Long, James C. Booth
… physical properties including interfacial polarization, ion mobility, and hydration. Many biologically and chemically … show that the presence of ions in solution produces a weak ion-pairing signal. We used microfluidics integrated with … solutions between 100 kHz – 67 GHz. To characterize the ion-pairing signal, we fit the calibrated data with two …

Vibrational Modes and Quantum Zero-Point Energy of Hydrogen in ZrH 0.0155 and ZrH 2

March 25, 2020
Author(s)
Timothy R Prisk, Alexander I. Kolesnikov, Garrett E. Granroth, Jun-li Lin, Brent J. Heuser
… effective Born-Oppenheimer potential experienced by the hydrogen atoms in -ZrH 2 is nearly isotropic and harmonic at … is approximately harmonic for small displacements of the hydrogen atoms. However, the anharmonicity of the potential … becomes readily apparent in the excited states of the hydrogen atoms, as the harmonic approximation breaks down in …
Displaying 751 - 775 of 3757
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